Palisades Tahoe Bike Path: Start at the plowed lot just past the Squaw Valley turnoff from Highway 89 and walk 2.3 miles along the golf course to the Palisades Tahoe ski area (or, park at the ski area or the Resort at Squaw Creek and access the trail from there). Have lunch at the Village at Palisades Tahoe, then walk back. Or, summon Mountaineer, a free, dog-friendly, on-demand, app-based winter travel service that will take you between destinations in Olympic Valley or Alpine Meadows (but not between the two). You can summon Mountaineer from anywhere within either valley. Check out this and other TCPUC (Tahoe City Public Utilities District) winter trail options here.
Truckee River Regional Park: Join local joggers and dog-walkers on the 5-mile Truckee River Legacy Trail, starting from this regional park that also encompasses an ice-skating rink. The park entrance is on Highway 267, a half-mile from downtown, and parking is free. Your well-behaved dog can be off-leash (Nov. 1-April 30) so long as she comes immediately when you call. You can also park and access the trail near the pedestrian bridge in downtown Truckee or at the other end, on Glenshire Drive, four miles east of Donner Pass Road.
Tahoe City Lakeside Trail: This mile-long promenade in downtown Tahoe City hugs the lakeshore, connecting with a trail that leads all the way to Palisades Tahoe. Park free at Commons Beach Park (heads up: dogs are allowed on the trail but not the park or beach).
And many more: For information on other dog-friendly winter trails in and around Truckee, click here. Staying in South Shore? This interactive map will help you find plowed trails where you can walk with your four-legged friend.